{"id":77642,"date":"2025-08-31T15:24:02","date_gmt":"2025-08-31T20:24:02","guid":{"rendered":"https:\/\/www.emanualonline.com\/blog\/?p=77642"},"modified":"2025-08-31T15:53:40","modified_gmt":"2025-08-31T20:53:40","slug":"p0384-obd2-glow-plug-control-module-control-circuit-high","status":"publish","type":"post","link":"https:\/\/www.emanualonline.com\/blog\/p0384-obd2-glow-plug-control-module-control-circuit-high","title":{"rendered":"P0384 OBD2: Glow Plug Control Module Control Circuit High"},"content":{"rendered":"<h2>What Does the P0384 Code Mean?<\/h2>\n<p>The P0384 code indicates an issue with the Glow Plug Control Module, specifically pointing to a control circuit that is reporting a high signal. This code is prevalent in diesel engines, where the Glow Plug Module is responsible for heating the combustion chambers, facilitating a quicker cold start.<\/p>\n<h2>What Causes the P0384 Code?<\/h2>\n<p>Several factors can trigger the P0384 code, including:<\/p>\n<ul>\n<li>Glow plug control module failure<\/li>\n<li>Powertrain Control Module (PCM) failure<\/li>\n<li>Wiring issues related to the Glow Plug Control Module<\/li>\n<\/ul>\n<h2>What Are the Symptoms of the P0384 Code?<\/h2>\n<p>Drivers may experience several symptoms when the P0384 code is present:<\/p>\n<ul>\n<li>Engine may not start<\/li>\n<li>Hard engine start<\/li>\n<li>Increased difficulty in cold starting<\/li>\n<\/ul>\n<h2>How Serious Is the P0384 Code?<\/h2>\n<p>The P0384 code is classified as urgent. An unresolved issue can lead to severe damage to the vehicle or pose risks to the driver and passengers. Immediate attention is necessary to prevent further complications.<\/p>\n<h2>How to Diagnose the P0384 Code<\/h2>\n<p>Diagnosing the P0384 code involves a few steps:<\/p>\n<ol>\n<li>Use an OBD-II scanner to confirm the presence of the P0384 code.<\/li>\n<li>Inspect the Glow Plug Control Module and its wiring for any visible damage or corrosion.<\/li>\n<li>Test the Glow Plug Control Module with a multimeter to ensure it is functioning correctly.<\/li>\n<li>Check the Powertrain Control Module (PCM) for any faults.<\/li>\n<\/ol>\n<h2>Common Repairs for the P0384 Code<\/h2>\n<p>To fix the P0384 code, the following repairs may be necessary:<\/p>\n<ul>\n<li>Replacing the Glow Plug Control Module<\/li>\n<li>Repairing or replacing damaged wiring<\/li>\n<li>Replacing glow plugs if they are faulty<\/li>\n<\/ul>\n<h2>How Much Does It Cost to Fix the P0384 Code?<\/h2>\n<p>The cost to fix the P0384 code can vary based on the specific issue and the vehicle model. On average, repairs can range from $100 to $600, depending on whether you need to replace the Glow Plug Control Module, the wiring, or the glow plugs themselves.<\/p>\n<h2>Can I Fix the P0384 Code Myself?<\/h2>\n<p>While some DIY enthusiasts may take on the challenge of diagnosing and repairing the P0384 code, it is essential to have a solid understanding of diesel engine systems and electrical diagnostics. If you are not confident in your skills, it is advisable to seek professional assistance to avoid further damage to your vehicle.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Does the P0384 Code Mean? The P0384 code indicates an issue with the Glow Plug Control Module, specifically pointing to a control circuit that is reporting a high signal. This code is prevalent in diesel engines, where the Glow Plug Module is responsible for heating the combustion chambers, facilitating a quicker cold start. What &hellip;<\/p>\n","protected":false},"author":26,"featured_media":94694,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_uag_custom_page_level_css":"","footnotes":""},"categories":[11987],"tags":[],"class_list":["post-77642","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-p-obd2-codes-powertrain"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.6 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>OBD2 Code P0384 \u2013 Causes, Symptoms, and Repairs<\/title>\n<meta name=\"description\" content=\"Learn all about the P0384 code, what causes Glow Plug Control Module Control Circuit High, and how to diagnose and fix common issues to maintain optimal engine performance.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.emanualonline.com\/blog\/p0384-obd2-glow-plug-control-module-control-circuit-high\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P0384 OBD2: Glow Plug Control Module Control Circuit High\" \/>\n<meta property=\"og:description\" content=\"What Does the P0384 Code Mean? The P0384 code indicates an issue with the Glow Plug Control Module, specifically pointing to a control circuit that is\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.emanualonline.com\/blog\/p0384-obd2-glow-plug-control-module-control-circuit-high\" \/>\n<meta property=\"og:site_name\" content=\"eManualOnline Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/EmanualOnline\/\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/jee514\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-31T20:24:02+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-31T20:53:40+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.emanualonline.com\/blog\/wp-content\/uploads\/2025\/08\/p0384-obd2-glow-plug-control-module-control-circuit-high.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta 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The P0384 code indicates an issue with the Glow Plug Control Module, specifically pointing to a control circuit that is reporting a high signal. This code is prevalent in diesel engines, where the Glow Plug Module is responsible for heating the combustion chambers, facilitating a quicker cold start. 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